WeakSet

`WeakSet.prototype.delete`

Removes the specified object from the WeakSet

Syntax

JavaScript

weakSet.delete(value)

Parameters

Parameter	Type	Description
value	object	The object to remove

Return Value

true if the object was found and removed, false otherwise

Examples

Basic Usage

const ws = new WeakSet()
const obj = {}
ws.add(obj)
console.log(ws.delete(obj)) // true
console.log(ws.has(obj)) // false

Practical Example

const tracked = new WeakSet<object>()
function untrack(obj: object) {
  if (tracked.delete(obj)) {
    console.log('Removed from tracking')
  }
}

Advanced Usage

const ws = new WeakSet()
const a = {}
ws.add(a)
ws.delete(a)
console.log(ws.delete(a)) // false (already removed)

Understanding WeakSet.prototype.delete

The WeakSet.prototype.delete method in JavaScript removes the specified object from the WeakSet. It belongs to the WeakSet object and is one of the most widely used methods for working with weakset values in modern JavaScript and TypeScript applications.

The method signature is weakSet.delete(value). It accepts 1 parameter: value. When called, it returns true if the object was found and removed, false otherwise. Understanding when and how to use delete() helps you write more expressive, readable code.

Common use cases for WeakSet.prototype.delete include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like weakset-add, weakset-has, weakmap-delete, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for WeakSet.prototype.delete is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.